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/* vi: set sw=4 ts=4: */
/*
* mini dpkg implementation for busybox.
* this is not meant as a replacement for dpkg
*
* written by glenn mcgrath with the help of others
* copyright (c) 2001 by glenn mcgrath
*
* parts of the version comparison code is plucked from the real dpkg
* application which is licensed GPLv2 and
* copyright (c) 1995 Ian Jackson <ian@chiark.greenend.org.uk>
*
* started life as a busybox implementation of udpkg
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/*
* known difference between busybox dpkg and the official dpkg that i don't
* consider important, its worth keeping a note of differences anyway, just to
* make it easier to maintain.
* - the first value for the confflile: field isnt placed on a new line.
* - when installing a package the status: field is placed at the end of the
* section, rather than just after the package: field.
*
* bugs that need to be fixed
* - (unknown, please let me know when you find any)
*
*/
//usage:#define dpkg_trivial_usage
//usage: "[-ilCPru] [-F OPT] PACKAGE"
//usage:#define dpkg_full_usage "\n\n"
//usage: "Install, remove and manage Debian packages\n"
//usage: IF_LONG_OPTS(
//usage: "\n -i,--install Install the package"
//usage: "\n -l,--list List of installed packages"
//usage: "\n --configure Configure an unpackaged package"
//usage: "\n -P,--purge Purge all files of a package"
//usage: "\n -r,--remove Remove all but the configuration files for a package"
//usage: "\n --unpack Unpack a package, but don't configure it"
//usage: "\n --force-depends Ignore dependency problems"
//usage: "\n --force-confnew Overwrite existing config files when installing"
//usage: "\n --force-confold Keep old config files when installing"
//usage: )
//usage: IF_NOT_LONG_OPTS(
//usage: "\n -i Install the package"
//usage: "\n -l List of installed packages"
//usage: "\n -C Configure an unpackaged package"
//usage: "\n -P Purge all files of a package"
//usage: "\n -r Remove all but the configuration files for a package"
//usage: "\n -u Unpack a package, but don't configure it"
//usage: "\n -F depends Ignore dependency problems"
//usage: "\n -F confnew Overwrite existing config files when installing"
//usage: "\n -F confold Keep old config files when installing"
//usage: )
#include "libbb.h"
#include <fnmatch.h>
#include "archive.h"
/* note: if you vary hash_prime sizes be aware,
* 1) tweaking these will have a big effect on how much memory this program uses.
* 2) for computational efficiency these hash tables should be at least 20%
* larger than the maximum number of elements stored in it.
* 3) all _hash_prime's must be a prime number or chaos is assured, if your looking
* for a prime, try http://www.utm.edu/research/primes/lists/small/10000.txt
* 4) if you go bigger than 15 bits you may get into trouble (untested) as its
* sometimes cast to an unsigned, if you go to 16 bit you will overlap
* int's and chaos is assured, 16381 is the max prime for 14 bit field
*/
/* NAME_HASH_PRIME, Stores package names and versions,
* I estimate it should be at least 50% bigger than PACKAGE_HASH_PRIME,
* as there a lot of duplicate version numbers */
#define NAME_HASH_PRIME 16381
/* PACKAGE_HASH_PRIME, Maximum number of unique packages,
* It must not be smaller than STATUS_HASH_PRIME,
* Currently only packages from status_hashtable are stored in here, but in
* future this may be used to store packages not only from a status file,
* but an available_hashtable, and even multiple packages files.
* Package can be stored more than once if they have different versions.
* e.g. The same package may have different versions in the status file
* and available file */
#define PACKAGE_HASH_PRIME 10007
typedef struct edge_s {
unsigned operator:4; /* was:3 */
unsigned type:4;
unsigned name:16; /* was:14 */
unsigned version:16; /* was:14 */
} edge_t;
typedef struct common_node_s {
unsigned name:16; /* was:14 */
unsigned version:16; /* was:14 */
unsigned num_of_edges:16; /* was:14 */
edge_t **edge;
} common_node_t;
/* Currently it doesnt store packages that have state-status of not-installed
* So it only really has to be the size of the maximum number of packages
* likely to be installed at any one time, so there is a bit of leeway here */
#define STATUS_HASH_PRIME 8191
typedef struct status_node_s {
unsigned package:16; /* was:14 */ /* has to fit PACKAGE_HASH_PRIME */
unsigned status:16; /* was:14 */ /* has to fit STATUS_HASH_PRIME */
} status_node_t;
/* Globals */
struct globals {
char *name_hashtable[NAME_HASH_PRIME + 1];
common_node_t *package_hashtable[PACKAGE_HASH_PRIME + 1];
status_node_t *status_hashtable[STATUS_HASH_PRIME + 1];
};
#define G (*ptr_to_globals)
#define name_hashtable (G.name_hashtable )
#define package_hashtable (G.package_hashtable)
#define status_hashtable (G.status_hashtable )
#define INIT_G() do { \
SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
} while (0)
/* Even numbers are for 'extras', like ored dependencies or null */
enum edge_type_e {
EDGE_NULL = 0,
EDGE_PRE_DEPENDS = 1,
EDGE_OR_PRE_DEPENDS = 2,
EDGE_DEPENDS = 3,
EDGE_OR_DEPENDS = 4,
EDGE_REPLACES = 5,
EDGE_PROVIDES = 7,
EDGE_CONFLICTS = 9,
EDGE_SUGGESTS = 11,
EDGE_RECOMMENDS = 13,
EDGE_ENHANCES = 15
};
enum operator_e {
VER_NULL = 0,
VER_EQUAL = 1,
VER_LESS = 2,
VER_LESS_EQUAL = 3,
VER_MORE = 4,
VER_MORE_EQUAL = 5,
VER_ANY = 6
};
typedef struct deb_file_s {
char *control_file;
char *filename;
unsigned package:16; /* was:14 */
} deb_file_t;
static void make_hash(const char *key, unsigned *start, unsigned *decrement, const int hash_prime)
{
unsigned long hash_num = key[0];
int len = strlen(key);
int i;
/* Maybe i should have uses a "proper" hashing algorithm here instead
* of making one up myself, seems to be working ok though. */
for (i = 1; i < len; i++) {
/* shifts the ascii based value and adds it to previous value
* shift amount is mod 24 because long int is 32 bit and data
* to be shifted is 8, don't want to shift data to where it has
* no effect */
hash_num += (key[i] + key[i-1]) << ((key[i] * i) % 24);
}
*start = (unsigned) hash_num % hash_prime;
*decrement = (unsigned) 1 + (hash_num % (hash_prime - 1));
}
/* this adds the key to the hash table */
static int search_name_hashtable(const char *key)
{
unsigned probe_address;
unsigned probe_decrement;
make_hash(key, &probe_address, &probe_decrement, NAME_HASH_PRIME);
while (name_hashtable[probe_address] != NULL) {
if (strcmp(name_hashtable[probe_address], key) == 0) {
return probe_address;
}
probe_address -= probe_decrement;
if ((int)probe_address < 0) {
probe_address += NAME_HASH_PRIME;
}
}
name_hashtable[probe_address] = xstrdup(key);
return probe_address;
}
/* this DOESNT add the key to the hashtable
* TODO make it consistent with search_name_hashtable
*/
static unsigned search_status_hashtable(const char *key)
{
unsigned probe_address;
unsigned probe_decrement;
make_hash(key, &probe_address, &probe_decrement, STATUS_HASH_PRIME);
while (status_hashtable[probe_address] != NULL) {
if (strcmp(key, name_hashtable[package_hashtable[status_hashtable[probe_address]->package]->name]) == 0) {
break;
}
probe_address -= probe_decrement;
if ((int)probe_address < 0) {
probe_address += STATUS_HASH_PRIME;
}
}
return probe_address;
}
static int order(char x)
{
return (x == '~' ? -1
: x == '\0' ? 0
: isdigit(x) ? 0
: isalpha(x) ? x
: (unsigned char)x + 256
);
}
/* This code is taken from dpkg and modified slightly to work with busybox */
static int version_compare_part(const char *val, const char *ref)
{
if (!val) val = "";
if (!ref) ref = "";
while (*val || *ref) {
int first_diff;
while ((*val && !isdigit(*val)) || (*ref && !isdigit(*ref))) {
int vc = order(*val);
int rc = order(*ref);
if (vc != rc)
return vc - rc;
val++;
ref++;
}
while (*val == '0')
val++;
while (*ref == '0')
ref++;
first_diff = 0;
while (isdigit(*val) && isdigit(*ref)) {
if (first_diff == 0)
first_diff = *val - *ref;
val++;
ref++;
}
if (isdigit(*val))
return 1;
if (isdigit(*ref))
return -1;
if (first_diff)
return first_diff;
}
return 0;
}
/* if ver1 < ver2 return -1,
* if ver1 = ver2 return 0,
* if ver1 > ver2 return 1,
*/
static int version_compare(const unsigned ver1, const unsigned ver2)
{
char *ch_ver1 = name_hashtable[ver1];
char *ch_ver2 = name_hashtable[ver2];
unsigned epoch1 = 0, epoch2 = 0;
char *colon;
char *deb_ver1, *deb_ver2;
char *upstream_ver1;
char *upstream_ver2;
int result;
/* Compare epoch */
colon = strchr(ch_ver1, ':');
if (colon) {
epoch1 = atoi(ch_ver1);
ch_ver1 = colon + 1;
}
colon = strchr(ch_ver2, ':');
if (colon) {
epoch2 = atoi(ch_ver2);
ch_ver2 = colon + 1;
}
if (epoch1 < epoch2) {
return -1;
}
if (epoch1 > epoch2) {
return 1;
}
/* Compare upstream version */
upstream_ver1 = xstrdup(ch_ver1);
upstream_ver2 = xstrdup(ch_ver2);
/* Chop off debian version, and store for later use */
deb_ver1 = strrchr(upstream_ver1, '-');
deb_ver2 = strrchr(upstream_ver2, '-');
if (deb_ver1) {
*deb_ver1++ = '\0';
}
if (deb_ver2) {
*deb_ver2++ = '\0';
}
result = version_compare_part(upstream_ver1, upstream_ver2);
if (result == 0) {
/* Compare debian versions */
result = version_compare_part(deb_ver1, deb_ver2);
}
free(upstream_ver1);
free(upstream_ver2);
return result;
}
static int test_version(const unsigned version1, const unsigned version2, const unsigned operator)
{
const int version_result = version_compare(version1, version2);
switch (operator) {
case VER_ANY:
return TRUE;
case VER_EQUAL:
return (version_result == 0);
case VER_LESS:
return (version_result < 0);
case VER_LESS_EQUAL:
return (version_result <= 0);
case VER_MORE:
return (version_result > 0);
case VER_MORE_EQUAL:
return (version_result >= 0);
}
return FALSE;
}
static int search_package_hashtable(const unsigned name, const unsigned version, const unsigned operator)
{
unsigned probe_address;
unsigned probe_decrement;
make_hash(name_hashtable[name], &probe_address, &probe_decrement, PACKAGE_HASH_PRIME);
while (package_hashtable[probe_address] != NULL) {
if (package_hashtable[probe_address]->name == name) {
if (operator == VER_ANY) {
return probe_address;
}
if (test_version(package_hashtable[probe_address]->version, version, operator)) {
return probe_address;
}
}
probe_address -= probe_decrement;
if ((int)probe_address < 0) {
probe_address += PACKAGE_HASH_PRIME;
}
}
return probe_address;
}
/*
* This function searches through the entire package_hashtable looking
* for a package which provides "needle". It returns the index into
* the package_hashtable for the providing package.
*
* needle is the index into name_hashtable of the package we are
* looking for.
*
* start_at is the index in the package_hashtable to start looking
* at. If start_at is -1 then start at the beginning. This is to allow
* for repeated searches since more than one package might provide
* needle.
*
* FIXME: I don't think this is very efficient, but I thought I'd keep
* it simple for now until it proves to be a problem.
*/
static int search_for_provides(int needle, int start_at)
{
int i, j;
common_node_t *p;
for (i = start_at + 1; i < PACKAGE_HASH_PRIME; i++) {
p = package_hashtable[i];
if (p == NULL)
continue;
for (j = 0; j < p->num_of_edges; j++)
if (p->edge[j]->type == EDGE_PROVIDES && p->edge[j]->name == needle)
return i;
}
return -1;
}
/*
* Add an edge to a node
*/
static void add_edge_to_node(common_node_t *node, edge_t *edge)
{
node->edge = xrealloc_vector(node->edge, 2, node->num_of_edges);
node->edge[node->num_of_edges++] = edge;
}
/*
* Create one new node and one new edge for every dependency.
*
* Dependencies which contain multiple alternatives are represented as
* an EDGE_OR_PRE_DEPENDS or EDGE_OR_DEPENDS node, followed by a
* number of EDGE_PRE_DEPENDS or EDGE_DEPENDS nodes. The name field of
* the OR edge contains the full dependency string while the version
* field contains the number of EDGE nodes which follow as part of
* this alternative.
*/
static void add_split_dependencies(common_node_t *parent_node, const char *whole_line, unsigned edge_type)
{
char *line = xstrdup(whole_line);
char *line2;
char *line_ptr1 = NULL;
char *line_ptr2 = NULL;
char *field;
char *field2;
char *version;
edge_t *edge;
edge_t *or_edge;
int offset_ch;
field = strtok_r(line, ",", &line_ptr1);
do {
/* skip leading spaces */
field += strspn(field, " ");
line2 = xstrdup(field);
field2 = strtok_r(line2, "|", &line_ptr2);
or_edge = NULL;
if ((edge_type == EDGE_DEPENDS || edge_type == EDGE_PRE_DEPENDS)
&& (strcmp(field, field2) != 0)
) {
or_edge = xzalloc(sizeof(edge_t));
or_edge->type = edge_type + 1;
or_edge->name = search_name_hashtable(field);
//or_edge->version = 0; // tracks the number of alternatives
add_edge_to_node(parent_node, or_edge);
}
do {
edge = xmalloc(sizeof(edge_t));
edge->type = edge_type;
/* Skip any extra leading spaces */
field2 += strspn(field2, " ");
/* Get dependency version info */
version = strchr(field2, '(');
if (version == NULL) {
edge->operator = VER_ANY;
/* Get the versions hash number, adding it if the number isnt already in there */
edge->version = search_name_hashtable("ANY");
} else {
/* Skip leading ' ' or '(' */
version += strspn(version, " (");
/* Calculate length of any operator characters */
offset_ch = strspn(version, "<=>");
/* Determine operator */
if (offset_ch > 0) {
if (strncmp(version, "=", offset_ch) == 0) {
edge->operator = VER_EQUAL;
} else if (strncmp(version, "<<", offset_ch) == 0) {
edge->operator = VER_LESS;
} else if (strncmp(version, "<=", offset_ch) == 0) {
edge->operator = VER_LESS_EQUAL;
} else if (strncmp(version, ">>", offset_ch) == 0) {
edge->operator = VER_MORE;
} else if (strncmp(version, ">=", offset_ch) == 0) {
edge->operator = VER_MORE_EQUAL;
} else {
bb_error_msg_and_die("illegal operator");
}
}
/* skip to start of version numbers */
version += offset_ch;
version += strspn(version, " ");
/* Truncate version at trailing ' ' or ')' */
version[strcspn(version, " )")] = '\0';
/* Get the versions hash number, adding it if the number isnt already in there */
edge->version = search_name_hashtable(version);
}
/* Get the dependency name */
field2[strcspn(field2, " (")] = '\0';
edge->name = search_name_hashtable(field2);
if (or_edge)
or_edge->version++;
add_edge_to_node(parent_node, edge);
field2 = strtok_r(NULL, "|", &line_ptr2);
} while (field2 != NULL);
free(line2);
field = strtok_r(NULL, ",", &line_ptr1);
} while (field != NULL);
free(line);
}
static void free_package(common_node_t *node)
{
unsigned i;
if (node) {
for (i = 0; i < node->num_of_edges; i++) {
free(node->edge[i]);
}
free(node->edge);
free(node);
}
}
/*
* Gets the next package field from package_buffer, separated into the field name
* and field value, it returns the int offset to the first character of the next field
*/
static int read_package_field(const char *package_buffer, char **field_name, char **field_value)
{
int offset_name_start = 0;
int offset_name_end = 0;
int offset_value_start = 0;
int offset_value_end = 0;
int offset = 0;
int next_offset;
int name_length;
int value_length;
int exit_flag = FALSE;
if (package_buffer == NULL) {
*field_name = NULL;
*field_value = NULL;
return -1;
}
while (1) {
next_offset = offset + 1;
switch (package_buffer[offset]) {
case '\0':
exit_flag = TRUE;
break;
case ':':
if (offset_name_end == 0) {
offset_name_end = offset;
offset_value_start = next_offset;
}
/* TODO: Name might still have trailing spaces if ':' isnt
* immediately after name */
break;
case '\n':
/* TODO: The char next_offset may be out of bounds */
if (package_buffer[next_offset] != ' ') {
exit_flag = TRUE;
break;
}
case '\t':
case ' ':
/* increment the value start point if its a just filler */
if (offset_name_start == offset) {
offset_name_start++;
}
if (offset_value_start == offset) {
offset_value_start++;
}
break;
}
if (exit_flag) {
/* Check that the names are valid */
offset_value_end = offset;
name_length = offset_name_end - offset_name_start;
value_length = offset_value_end - offset_value_start;
if (name_length == 0) {
break;
}
if ((name_length > 0) && (value_length > 0)) {
break;
}
/* If not valid, start fresh with next field */
exit_flag = FALSE;
offset_name_start = offset + 1;
offset_name_end = 0;
offset_value_start = offset + 1;
offset_value_end = offset + 1;
offset++;
}
offset++;
}
*field_name = NULL;
if (name_length) {
*field_name = xstrndup(&package_buffer[offset_name_start], name_length);
}
*field_value = NULL;
if (value_length > 0) {
*field_value = xstrndup(&package_buffer[offset_value_start], value_length);
}
return next_offset;
}
static unsigned fill_package_struct(char *control_buffer)
{
static const char field_names[] ALIGN1 =
"Package\0""Version\0"
"Pre-Depends\0""Depends\0""Replaces\0""Provides\0"
"Conflicts\0""Suggests\0""Recommends\0""Enhances\0";
common_node_t *new_node = xzalloc(sizeof(common_node_t));
char *field_name;
char *field_value;
int field_start = 0;
int num = -1;
int buffer_length = strlen(control_buffer);
new_node->version = search_name_hashtable("unknown");
while (field_start < buffer_length) {
unsigned field_num;
field_start += read_package_field(&control_buffer[field_start],
&field_name, &field_value);
if (field_name == NULL) {
goto fill_package_struct_cleanup;
}
field_num = index_in_strings(field_names, field_name);
switch (field_num) {
case 0: /* Package */
new_node->name = search_name_hashtable(field_value);
break;
case 1: /* Version */
new_node->version = search_name_hashtable(field_value);
break;
case 2: /* Pre-Depends */
add_split_dependencies(new_node, field_value, EDGE_PRE_DEPENDS);
break;
case 3: /* Depends */
add_split_dependencies(new_node, field_value, EDGE_DEPENDS);
break;
case 4: /* Replaces */
add_split_dependencies(new_node, field_value, EDGE_REPLACES);
break;
case 5: /* Provides */
add_split_dependencies(new_node, field_value, EDGE_PROVIDES);
break;
case 6: /* Conflicts */
add_split_dependencies(new_node, field_value, EDGE_CONFLICTS);
break;
case 7: /* Suggests */
add_split_dependencies(new_node, field_value, EDGE_SUGGESTS);
break;
case 8: /* Recommends */
add_split_dependencies(new_node, field_value, EDGE_RECOMMENDS);
break;
case 9: /* Enhances */
add_split_dependencies(new_node, field_value, EDGE_ENHANCES);
break;
}
fill_package_struct_cleanup:
free(field_name);
free(field_value);
}
if (new_node->version == search_name_hashtable("unknown")) {
free_package(new_node);
return -1;
}
num = search_package_hashtable(new_node->name, new_node->version, VER_EQUAL);
free_package(package_hashtable[num]);
package_hashtable[num] = new_node;
return num;
}
/* if num = 1, it returns the want status, 2 returns flag, 3 returns status */
static unsigned get_status(const unsigned status_node, const int num)
{
char *status_string = name_hashtable[status_hashtable[status_node]->status];
char *state_sub_string;
unsigned state_sub_num;
int len;
int i;
/* set tmp_string to point to the start of the word number */
for (i = 1; i < num; i++) {
/* skip past a word */
status_string += strcspn(status_string, " ");
/* skip past the separating spaces */
status_string += strspn(status_string, " ");
}
len = strcspn(status_string, " \n");
state_sub_string = xstrndup(status_string, len);
state_sub_num = search_name_hashtable(state_sub_string);
free(state_sub_string);
return state_sub_num;
}
static void set_status(const unsigned status_node_num, const char *new_value, const int position)
{
const unsigned new_value_num = search_name_hashtable(new_value);
unsigned want = get_status(status_node_num, 1);
unsigned flag = get_status(status_node_num, 2);
unsigned status = get_status(status_node_num, 3);
char *new_status;
switch (position) {
case 1:
want = new_value_num;
break;
case 2:
flag = new_value_num;
break;
case 3:
status = new_value_num;
break;
default:
bb_error_msg_and_die("DEBUG ONLY: this shouldnt happen");
}
new_status = xasprintf("%s %s %s", name_hashtable[want], name_hashtable[flag], name_hashtable[status]);
status_hashtable[status_node_num]->status = search_name_hashtable(new_status);
free(new_status);
}
static const char *describe_status(int status_num)
{
int status_want, status_state;
if (status_hashtable[status_num] == NULL || status_hashtable[status_num]->status == 0)
return "is not installed or flagged to be installed";
status_want = get_status(status_num, 1);
status_state = get_status(status_num, 3);
if (status_state == search_name_hashtable("installed")) {
if (status_want == search_name_hashtable("install"))
return "is installed";
if (status_want == search_name_hashtable("deinstall"))
return "is marked to be removed";
if (status_want == search_name_hashtable("purge"))
return "is marked to be purged";
}
if (status_want == search_name_hashtable("unknown"))
return "is in an indeterminate state";
if (status_want == search_name_hashtable("install"))
return "is marked to be installed";
return "is not installed or flagged to be installed";
}
static void index_status_file(const char *filename)
{
FILE *status_file;
char *control_buffer;
char *status_line;
status_node_t *status_node = NULL;
unsigned status_num;
status_file = xfopen_for_read(filename);
while ((control_buffer = xmalloc_fgetline_str(status_file, "\n\n")) != NULL) {
const unsigned package_num = fill_package_struct(control_buffer);
if (package_num != -1) {
status_node = xmalloc(sizeof(status_node_t));
/* fill_package_struct doesnt handle the status field */
status_line = strstr(control_buffer, "Status:");
if (status_line != NULL) {
status_line += 7;
status_line += strspn(status_line, " \n\t");
status_line = xstrndup(status_line, strcspn(status_line, "\n"));
status_node->status = search_name_hashtable(status_line);
free(status_line);
}
status_node->package = package_num;
status_num = search_status_hashtable(name_hashtable[package_hashtable[status_node->package]->name]);
status_hashtable[status_num] = status_node;
}
free(control_buffer);
}
fclose(status_file);
}
static void write_buffer_no_status(FILE *new_status_file, const char *control_buffer)
{
char *name;
char *value;
int start = 0;
while (1) {
start += read_package_field(&control_buffer[start], &name, &value);
if (name == NULL) {
break;
}
if (strcmp(name, "Status") != 0) {
fprintf(new_status_file, "%s: %s\n", name, value);
}
}
}
/* This could do with a cleanup */
static void write_status_file(deb_file_t **deb_file)
{
FILE *old_status_file = xfopen_for_read("/var/lib/dpkg/status");
FILE *new_status_file = xfopen_for_write("/var/lib/dpkg/status.udeb");
char *package_name;
char *status_from_file;
char *control_buffer = NULL;
char *tmp_string;
int status_num;
int field_start = 0;
int write_flag;
int i = 0;
/* Update previously known packages */
while ((control_buffer = xmalloc_fgetline_str(old_status_file, "\n\n")) != NULL) {
tmp_string = strstr(control_buffer, "Package:");
if (tmp_string == NULL) {
continue;
}
tmp_string += 8;
tmp_string += strspn(tmp_string, " \n\t");
package_name = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
write_flag = FALSE;
tmp_string = strstr(control_buffer, "Status:");
if (tmp_string != NULL) {
/* Separate the status value from the control buffer */
tmp_string += 7;
tmp_string += strspn(tmp_string, " \n\t");
status_from_file = xstrndup(tmp_string, strcspn(tmp_string, "\n"));
} else {
status_from_file = NULL;
}
/* Find this package in the status hashtable */
status_num = search_status_hashtable(package_name);
if (status_hashtable[status_num] != NULL) {
const char *status_from_hashtable = name_hashtable[status_hashtable[status_num]->status];
if (strcmp(status_from_file, status_from_hashtable) != 0) {
/* New status isnt exactly the same as old status */
const int state_status = get_status(status_num, 3);
if ((strcmp("installed", name_hashtable[state_status]) == 0)
|| (strcmp("unpacked", name_hashtable[state_status]) == 0)
) {
/* We need to add the control file from the package */
i = 0;
while (deb_file[i] != NULL) {
if (strcmp(package_name, name_hashtable[package_hashtable[deb_file[i]->package]->name]) == 0) {
/* Write a status file entry with a modified status */
/* remove trailing \n's */
write_buffer_no_status(new_status_file, deb_file[i]->control_file);
set_status(status_num, "ok", 2);
fprintf(new_status_file, "Status: %s\n\n",
name_hashtable[status_hashtable[status_num]->status]);
write_flag = TRUE;
break;
}
i++;
}
/* This is temperary, debugging only */
if (deb_file[i] == NULL) {
bb_error_msg_and_die("ALERT: cannot find a control file, "
"your status file may be broken, status may be "
"incorrect for %s", package_name);
}
}
else if (strcmp("not-installed", name_hashtable[state_status]) == 0) {
/* Only write the Package, Status, Priority and Section lines */
fprintf(new_status_file, "Package: %s\n", package_name);
fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
while (1) {
char *field_name;
char *field_value;
field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value);
if (field_name == NULL) {
break;
}
if ((strcmp(field_name, "Priority") == 0)
|| (strcmp(field_name, "Section") == 0)
) {
fprintf(new_status_file, "%s: %s\n", field_name, field_value);
}
}
write_flag = TRUE;
fputs("\n", new_status_file);
}
else if (strcmp("config-files", name_hashtable[state_status]) == 0) {
/* only change the status line */
while (1) {
char *field_name;
char *field_value;
field_start += read_package_field(&control_buffer[field_start], &field_name, &field_value);
if (field_name == NULL) {
break;
}
/* Setup start point for next field */
if (strcmp(field_name, "Status") == 0) {
fprintf(new_status_file, "Status: %s\n", status_from_hashtable);
} else {
fprintf(new_status_file, "%s: %s\n", field_name, field_value);
}
}
write_flag = TRUE;
fputs("\n", new_status_file);
}
}
}
/* If the package from the status file wasnt handle above, do it now*/
if (!write_flag) {
fprintf(new_status_file, "%s\n\n", control_buffer);
}
free(status_from_file);
free(package_name);
free(control_buffer);
}
/* Write any new packages */
for (i = 0; deb_file[i] != NULL; i++) {
status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[i]->package]->name]);
if (strcmp("reinstreq", name_hashtable[get_status(status_num, 2)]) == 0) {
write_buffer_no_status(new_status_file, deb_file[i]->control_file);
set_status(status_num, "ok", 2);
fprintf(new_status_file, "Status: %s\n\n", name_hashtable[status_hashtable[status_num]->status]);
}
}
fclose(old_status_file);
fclose(new_status_file);
/* Create a separate backfile to dpkg */
if (rename("/var/lib/dpkg/status", "/var/lib/dpkg/status.udeb.bak") == -1) {
if (errno != ENOENT)
bb_error_msg_and_die("can't create backup status file");
/* Its ok if renaming the status file fails because status
* file doesnt exist, maybe we are starting from scratch */
bb_error_msg("no status file found, creating new one");
}
xrename("/var/lib/dpkg/status.udeb", "/var/lib/dpkg/status");
}
/* This function returns TRUE if the given package can satisfy a
* dependency of type depend_type.
*
* A pre-depends is satisfied only if a package is already installed,
* which a regular depends can be satisfied by a package which we want
* to install.
*/
static int package_satisfies_dependency(int package, int depend_type)
{
int status_num = search_status_hashtable(name_hashtable[package_hashtable[package]->name]);
/* status could be unknown if package is a pure virtual
* provides which cannot satisfy any dependency by itself.
*/
if (status_hashtable[status_num] == NULL)
return 0;
switch (depend_type) {
case EDGE_PRE_DEPENDS: return get_status(status_num, 3) == search_name_hashtable("installed");
case EDGE_DEPENDS: return get_status(status_num, 1) == search_name_hashtable("install");
}
return 0;
}
static int check_deps(deb_file_t **deb_file, int deb_start /*, int dep_max_count - ?? */)
{
int *conflicts = NULL;
int conflicts_num = 0;
int i = deb_start;
int j;
/* Check for conflicts
* TODO: TEST if conflicts with other packages to be installed
*
* Add install packages and the packages they provide
* to the list of files to check conflicts for
*/
/* Create array of package numbers to check against
* installed package for conflicts*/
while (deb_file[i] != NULL) {
const unsigned package_num = deb_file[i]->package;
conflicts = xrealloc_vector(conflicts, 2, conflicts_num);
conflicts[conflicts_num] = package_num;
conflicts_num++;
/* add provides to conflicts list */
for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) {
if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) {
const int conflicts_package_num = search_package_hashtable(
package_hashtable[package_num]->edge[j]->name,
package_hashtable[package_num]->edge[j]->version,
package_hashtable[package_num]->edge[j]->operator);
if (package_hashtable[conflicts_package_num] == NULL) {
/* create a new package */
common_node_t *new_node = xzalloc(sizeof(common_node_t));
new_node->name = package_hashtable[package_num]->edge[j]->name;
new_node->version = package_hashtable[package_num]->edge[j]->version;
package_hashtable[conflicts_package_num] = new_node;
}
conflicts = xrealloc_vector(conflicts, 2, conflicts_num);
conflicts[conflicts_num] = conflicts_package_num;
conflicts_num++;
}
}
i++;
}
/* Check conflicts */
i = 0;
while (deb_file[i] != NULL) {
const common_node_t *package_node = package_hashtable[deb_file[i]->package];
int status_num = 0;
status_num = search_status_hashtable(name_hashtable[package_node->name]);
if (get_status(status_num, 3) == search_name_hashtable("installed")) {
i++;
continue;
}
for (j = 0; j < package_node->num_of_edges; j++) {
const edge_t *package_edge = package_node->edge[j];
if (package_edge->type == EDGE_CONFLICTS) {
const unsigned package_num =
search_package_hashtable(package_edge->name,
package_edge->version,
package_edge->operator);
int result = 0;
if (package_hashtable[package_num] != NULL) {
status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
if (get_status(status_num, 1) == search_name_hashtable("install")) {
result = test_version(package_hashtable[deb_file[i]->package]->version,
package_edge->version, package_edge->operator);
}
}
if (result) {
bb_error_msg_and_die("package %s conflicts with %s",
name_hashtable[package_node->name],
name_hashtable[package_edge->name]);
}
}
}
i++;
}
/* Check dependendcies */
for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
int status_num = 0;
int number_of_alternatives = 0;
const edge_t * root_of_alternatives = NULL;
const common_node_t *package_node = package_hashtable[i];
/* If the package node does not exist then this
* package is a virtual one. In which case there are
* no dependencies to check.
*/
if (package_node == NULL) continue;
status_num = search_status_hashtable(name_hashtable[package_node->name]);
/* If there is no status then this package is a
* virtual one provided by something else. In which
* case there are no dependencies to check.
*/
if (status_hashtable[status_num] == NULL) continue;
/* If we don't want this package installed then we may
* as well ignore it's dependencies.
*/
if (get_status(status_num, 1) != search_name_hashtable("install")) {
continue;
}
/* This code is tested only for EDGE_DEPENDS, since I
* have no suitable pre-depends available. There is no
* reason that it shouldn't work though :-)
*/
for (j = 0; j < package_node->num_of_edges; j++) {
const edge_t *package_edge = package_node->edge[j];
unsigned package_num;
if (package_edge->type == EDGE_OR_PRE_DEPENDS
|| package_edge->type == EDGE_OR_DEPENDS
) {
/* start an EDGE_OR_ list */
number_of_alternatives = package_edge->version;
root_of_alternatives = package_edge;
continue;
}
if (number_of_alternatives == 0) { /* not in the middle of an EDGE_OR_ list */
number_of_alternatives = 1;
root_of_alternatives = NULL;
}
package_num = search_package_hashtable(package_edge->name, package_edge->version, package_edge->operator);
if (package_edge->type == EDGE_PRE_DEPENDS
|| package_edge->type == EDGE_DEPENDS
) {
int result=1;
status_num = 0;
/* If we are inside an alternative then check
* this edge is the right type.
*
* EDGE_DEPENDS == OR_DEPENDS -1
* EDGE_PRE_DEPENDS == OR_PRE_DEPENDS -1
*/
if (root_of_alternatives && package_edge->type != root_of_alternatives->type - 1)
bb_error_msg_and_die("fatal error, package dependencies corrupt: %d != %d - 1",
package_edge->type, root_of_alternatives->type);
if (package_hashtable[package_num] != NULL)
result = !package_satisfies_dependency(package_num, package_edge->type);
if (result) { /* check for other package which provide what we are looking for */
int provider = -1;
while ((provider = search_for_provides(package_edge->name, provider)) > -1) {
if (package_hashtable[provider] == NULL) {
puts("Have a provider but no package information for it");
continue;
}
result = !package_satisfies_dependency(provider, package_edge->type);
if (result == 0)
break;
}
}
/* It must be already installed, or to be installed */
number_of_alternatives--;
if (result && number_of_alternatives == 0) {
if (root_of_alternatives)
bb_error_msg_and_die(
"package %s %sdepends on %s, "
"which cannot be satisfied",
name_hashtable[package_node->name],
package_edge->type == EDGE_PRE_DEPENDS ? "pre-" : "",
name_hashtable[root_of_alternatives->name]);
bb_error_msg_and_die(
"package %s %sdepends on %s, which %s\n",
name_hashtable[package_node->name],
package_edge->type == EDGE_PRE_DEPENDS ? "pre-" : "",
name_hashtable[package_edge->name],
describe_status(status_num));
}
if (result == 0 && number_of_alternatives) {
/* we've found a package which
* satisfies the dependency,
* so skip over the rest of
* the alternatives.
*/
j += number_of_alternatives;
number_of_alternatives = 0;
}
}
}
}
free(conflicts);
return TRUE;
}
static char **create_list(const char *filename)
{
FILE *list_stream;
char **file_list;
char *line;
int count;
/* don't use [xw]fopen here, handle error ourself */
list_stream = fopen_for_read(filename);
if (list_stream == NULL) {
return NULL;
}
file_list = NULL;
count = 0;
while ((line = xmalloc_fgetline(list_stream)) != NULL) {
file_list = xrealloc_vector(file_list, 2, count);
file_list[count++] = line;
/*file_list[count] = NULL; - xrealloc_vector did it */
}
fclose(list_stream);
return file_list;
}
/* maybe i should try and hook this into remove_file.c somehow */
static int remove_file_array(char **remove_names, char **exclude_names)
{
struct stat path_stat;
int remove_flag = 1; /* not removed anything yet */
int i, j;
if (remove_names == NULL) {
return 0;
}
for (i = 0; remove_names[i] != NULL; i++) {
if (exclude_names != NULL) {
for (j = 0; exclude_names[j] != NULL; j++) {
if (strcmp(remove_names[i], exclude_names[j]) == 0) {
goto skip;
}
}
}
/* TODO: why we are checking lstat? we can just try rm/rmdir */
if (lstat(remove_names[i], &path_stat) < 0) {
continue;
}
if (S_ISDIR(path_stat.st_mode)) {
remove_flag &= rmdir(remove_names[i]); /* 0 if no error */
} else {
remove_flag &= unlink(remove_names[i]); /* 0 if no error */
}
skip:
continue;
}
return (remove_flag == 0);
}
static void run_package_script_or_die(const char *package_name, const char *script_type)
{
char *script_path;
int result;
script_path = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, script_type);
/* If the file doesnt exist is isnt fatal */
result = access(script_path, F_OK) ? EXIT_SUCCESS : system(script_path);
free(script_path);
if (result)
bb_error_msg_and_die("%s failed, exit code %d", script_type, result);
}
/*
The policy manual defines what scripts get called when and with
what arguments. I realize that busybox does not support all of
these scenarios, but it does support some of them; it does not,
however, run them with any parameters in run_package_script_or_die().
Here are the scripts:
preinst install
preinst install <old_version>
preinst upgrade <old_version>
preinst abort_upgrade <new_version>
postinst configure <most_recent_version>
postinst abort-upgade <new_version>
postinst abort-remove
postinst abort-remove in-favour <package> <version>
postinst abort-deconfigure in-favor <failed_install_package> removing <conflicting_package> <version>
prerm remove
prerm upgrade <new_version>
prerm failed-upgrade <old_version>
prerm remove in-favor <package> <new_version>
prerm deconfigure in-favour <package> <version> removing <package> <version>
postrm remove
postrm purge
postrm upgrade <new_version>
postrm failed-upgrade <old_version>
postrm abort-install
postrm abort-install <old_version>
postrm abort-upgrade <old_version>
postrm disappear <overwriter> <version>
*/
static const char *const all_control_files[] = {
"preinst", "postinst", "prerm", "postrm",
"list", "md5sums", "shlibs", "conffiles",
"config", "templates"
};
static char **all_control_list(const char *package_name)
{
unsigned i = 0;
char **remove_files;
/* Create a list of all /var/lib/dpkg/info/<package> files */
remove_files = xzalloc(sizeof(all_control_files) + sizeof(char*));
while (i < ARRAY_SIZE(all_control_files)) {
remove_files[i] = xasprintf("/var/lib/dpkg/info/%s.%s",
package_name, all_control_files[i]);
i++;
}
return remove_files;
}
static void free_array(char **array)
{
if (array) {
unsigned i = 0;
while (array[i]) {
free(array[i]);
i++;
}
free(array);
}
}
/* This function lists information on the installed packages. It loops through
* the status_hashtable to retrieve the info. This results in smaller code than
* scanning the status file. The resulting list, however, is unsorted.
*/
static void list_packages(const char *pattern)
{
int i;
puts(" Name Version");
puts("+++-==============-==============");
/* go through status hash, dereference package hash and finally strings */
for (i = 0; i < STATUS_HASH_PRIME+1; i++) {
if (status_hashtable[i]) {
const char *stat_str; /* status string */
const char *name_str; /* package name */
const char *vers_str; /* version */
char s1, s2; /* status abbreviations */
int spccnt; /* space count */
int j;
stat_str = name_hashtable[status_hashtable[i]->status];
name_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->name];
vers_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->version];
if (pattern && fnmatch(pattern, name_str, 0) != 0)
continue;
/* get abbreviation for status field 1 */
s1 = stat_str[0] == 'i' ? 'i' : 'r';
/* get abbreviation for status field 2 */
for (j = 0, spccnt = 0; stat_str[j] && spccnt < 2; j++) {
if (stat_str[j] == ' ') spccnt++;
}
s2 = stat_str[j];
/* print out the line formatted like Debian dpkg */
printf("%c%c %-14s %s\n", s1, s2, name_str, vers_str);
}
}
}
static void remove_package(const unsigned package_num, int noisy)
{
const char *package_name = name_hashtable[package_hashtable[package_num]->name];
const char *package_version = name_hashtable[package_hashtable[package_num]->version];
const unsigned status_num = search_status_hashtable(package_name);
const int package_name_length = strlen(package_name);
char **remove_files;
char **exclude_files;
char list_name[package_name_length + 25];
char conffile_name[package_name_length + 30];
if (noisy)
printf("Removing %s (%s)...\n", package_name, package_version);
/* Run prerm script */
run_package_script_or_die(package_name, "prerm");
/* Create a list of files to remove, and a separate list of those to keep */
sprintf(list_name, "/var/lib/dpkg/info/%s.%s", package_name, "list");
remove_files = create_list(list_name);
sprintf(conffile_name, "/var/lib/dpkg/info/%s.%s", package_name, "conffiles");
exclude_files = create_list(conffile_name);
/* Some directories can't be removed straight away, so do multiple passes */
while (remove_file_array(remove_files, exclude_files))
continue;
free_array(exclude_files);
free_array(remove_files);
/* Create a list of files in /var/lib/dpkg/info/<package>.* to keep */
exclude_files = xzalloc(sizeof(exclude_files[0]) * 3);
exclude_files[0] = xstrdup(conffile_name);
exclude_files[1] = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, "postrm");
/* Create a list of all /var/lib/dpkg/info/<package> files */
remove_files = all_control_list(package_name);
remove_file_array(remove_files, exclude_files);
free_array(remove_files);
free_array(exclude_files);
/* rename <package>.conffiles to <package>.list
* The conffiles control file isn't required in Debian packages, so don't
* error out if it's missing. */
rename(conffile_name, list_name);
/* Change package status */
set_status(status_num, "config-files", 3);
}
static void purge_package(const unsigned package_num)
{
const char *package_name = name_hashtable[package_hashtable[package_num]->name];
const char *package_version = name_hashtable[package_hashtable[package_num]->version];
const unsigned status_num = search_status_hashtable(package_name);
char **remove_files;
char **exclude_files;
char list_name[strlen(package_name) + 25];
printf("Purging %s (%s)...\n", package_name, package_version);
/* Run prerm script */
run_package_script_or_die(package_name, "prerm");
/* Create a list of files to remove */
sprintf(list_name, "/var/lib/dpkg/info/%s.%s", package_name, "list");
remove_files = create_list(list_name);
/* Some directories cant be removed straight away, so do multiple passes */
while (remove_file_array(remove_files, NULL))
continue;
free_array(remove_files);
/* Create a list of all /var/lib/dpkg/info/<package> files */
remove_files = all_control_list(package_name);
/* Delete all of them except the postrm script */
exclude_files = xzalloc(sizeof(exclude_files[0]) * 2);
exclude_files[0] = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, "postrm");
remove_file_array(remove_files, exclude_files);
free_array(exclude_files);
/* Run and remove postrm script */
run_package_script_or_die(package_name, "postrm");
remove_file_array(remove_files, NULL);
free_array(remove_files);
/* Change package status */
set_status(status_num, "not-installed", 3);
}
static archive_handle_t *init_archive_deb_ar(const char *filename)
{
archive_handle_t *ar_handle;
/* Setup an ar archive handle that refers to the gzip sub archive */
ar_handle = init_handle();
ar_handle->filter = filter_accept_list_reassign;
ar_handle->src_fd = xopen(filename, O_RDONLY);
return ar_handle;
}
static void init_archive_deb_control(archive_handle_t *ar_handle)
{
archive_handle_t *tar_handle;
/* Setup the tar archive handle */
tar_handle = init_handle();
tar_handle->src_fd = ar_handle->src_fd;
/* We don't care about data.tar.* or debian-binary, just control.tar.* */
#if ENABLE_FEATURE_SEAMLESS_GZ
llist_add_to(&(ar_handle->accept), (char*)"control.tar.gz");
#endif
#if ENABLE_FEATURE_SEAMLESS_BZ2
llist_add_to(&(ar_handle->accept), (char*)"control.tar.bz2");
#endif
/* Assign the tar handle as a subarchive of the ar handle */
ar_handle->dpkg__sub_archive = tar_handle;
}
static void init_archive_deb_data(archive_handle_t *ar_handle)
{
archive_handle_t *tar_handle;
/* Setup the tar archive handle */
tar_handle = init_handle();
tar_handle->src_fd = ar_handle->src_fd;
/* We don't care about control.tar.* or debian-binary, just data.tar.* */
#if ENABLE_FEATURE_SEAMLESS_GZ
llist_add_to(&(ar_handle->accept), (char*)"data.tar.gz");
#endif
#if ENABLE_FEATURE_SEAMLESS_BZ2
llist_add_to(&(ar_handle->accept), (char*)"data.tar.bz2");
#endif
/* Assign the tar handle as a subarchive of the ar handle */
ar_handle->dpkg__sub_archive = tar_handle;
}
static void FAST_FUNC data_extract_to_buffer(archive_handle_t *archive_handle)
{
unsigned size = archive_handle->file_header->size;
archive_handle->dpkg__buffer = xzalloc(size + 1);
xread(archive_handle->src_fd, archive_handle->dpkg__buffer, size);
}
static char *deb_extract_control_file_to_buffer(archive_handle_t *ar_handle, llist_t *myaccept)
{
ar_handle->dpkg__sub_archive->action_data = data_extract_to_buffer;
ar_handle->dpkg__sub_archive->accept = myaccept;
ar_handle->dpkg__sub_archive->filter = filter_accept_list;
unpack_ar_archive(ar_handle);
close(ar_handle->src_fd);
return ar_handle->dpkg__sub_archive->dpkg__buffer;
}
static void append_control_file_to_llist(const char *package_name, const char *control_name, llist_t **ll)
{
FILE *fp;
char *filename, *line;
filename = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, control_name);
fp = fopen_for_read(filename);
free(filename);
if (fp != NULL) {
while ((line = xmalloc_fgetline(fp)) != NULL)
llist_add_to(ll, line);
fclose(fp);
}
}
static char FAST_FUNC filter_rename_config(archive_handle_t *archive_handle)
{
int fd;
char *name_ptr = archive_handle->file_header->name + 1;
/* Is this file marked as config file? */
if (!find_list_entry(archive_handle->accept, name_ptr))
return EXIT_SUCCESS; /* no */
fd = open(name_ptr, O_RDONLY);
if (fd >= 0) {
md5_ctx_t md5;
char *md5line, *buf;
int count;
/* Calculate MD5 of existing file */
buf = xmalloc(4096);
md5_begin(&md5);
while ((count = safe_read(fd, buf, 4096)) > 0)
md5_hash(&md5, buf, count);
md5_end(&md5, buf); /* using buf as result storage */
close(fd);
md5line = xmalloc(16 * 2 + 2 + strlen(name_ptr) + 1);
sprintf(bin2hex(md5line, buf, 16), " %s", name_ptr);
free(buf);
/* Is it changed after install? */
if (find_list_entry(archive_handle->accept, md5line) == NULL) {
printf("Warning: Creating %s as %s.dpkg-new\n", name_ptr, name_ptr);
archive_handle->file_header->name = xasprintf("%s.dpkg-new", archive_handle->file_header->name);
}
free(md5line);
}
return EXIT_SUCCESS;
}
static void FAST_FUNC data_extract_all_prefix(archive_handle_t *archive_handle)
{
char *name_ptr = archive_handle->file_header->name;
/* Skip all leading "/" */
while (*name_ptr == '/')
name_ptr++;
/* Skip all leading "./" and "../" */
while (name_ptr[0] == '.') {
if (name_ptr[1] == '.')
name_ptr++;
if (name_ptr[1] != '/')
break;
name_ptr += 2;
}
if (name_ptr[0] != '\0') {
archive_handle->file_header->name = xasprintf("%s%s", archive_handle->dpkg__buffer, name_ptr);
data_extract_all(archive_handle);
if (fnmatch("*.dpkg-new", archive_handle->file_header->name, 0) == 0) {
/* remove .dpkg-new suffix */
archive_handle->file_header->name[strlen(archive_handle->file_header->name) - 9] = '\0';
}
}
}
enum {
/* Commands */
OPT_configure = (1 << 0),
OPT_install = (1 << 1),
OPT_list_installed = (1 << 2),
OPT_purge = (1 << 3),
OPT_remove = (1 << 4),
OPT_unpack = (1 << 5),
OPTMASK_cmd = (1 << 6) - 1,
/* Options */
OPT_force = (1 << 6),
OPT_force_ignore_depends = (1 << 7),
OPT_force_confnew = (1 << 8),
OPT_force_confold = (1 << 9),
};
static void unpack_package(deb_file_t *deb_file)
{
const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
const unsigned status_num = search_status_hashtable(package_name);
const unsigned status_package_num = status_hashtable[status_num]->package;
char *info_prefix;
char *list_filename;
archive_handle_t *archive_handle;
FILE *out_stream;
llist_t *accept_list;
llist_t *conffile_list;
int i;
/* If existing version, remove it first */
conffile_list = NULL;
if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
/* Package is already installed, remove old version first */
printf("Preparing to replace %s %s (using %s)...\n", package_name,
name_hashtable[package_hashtable[status_package_num]->version],
deb_file->filename);
/* Read md5sums from old package */
if (!(option_mask32 & OPT_force_confold))
append_control_file_to_llist(package_name, "md5sums", &conffile_list);
remove_package(status_package_num, 0);
} else {
printf("Unpacking %s (from %s)...\n", package_name, deb_file->filename);
}
/* Extract control.tar.gz to /var/lib/dpkg/info/<package>.filename */
info_prefix = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, "");
archive_handle = init_archive_deb_ar(deb_file->filename);
init_archive_deb_control(archive_handle);
accept_list = NULL;
i = 0;
while (i < ARRAY_SIZE(all_control_files)) {
char *c = xasprintf("./%s", all_control_files[i]);
llist_add_to(&accept_list, c);
i++;
}
archive_handle->dpkg__sub_archive->accept = accept_list;
archive_handle->dpkg__sub_archive->filter = filter_accept_list;
archive_handle->dpkg__sub_archive->action_data = data_extract_all_prefix;
archive_handle->dpkg__sub_archive->dpkg__buffer = info_prefix;
archive_handle->dpkg__sub_archive->ah_flags |= ARCHIVE_UNLINK_OLD;
unpack_ar_archive(archive_handle);
/* Run the preinst prior to extracting */
run_package_script_or_die(package_name, "preinst");
/* Don't overwrite existing config files */
if (!(option_mask32 & OPT_force_confnew))
append_control_file_to_llist(package_name, "conffiles", &conffile_list);
/* Extract data.tar.gz to the root directory */
archive_handle = init_archive_deb_ar(deb_file->filename);
init_archive_deb_data(archive_handle);
archive_handle->dpkg__sub_archive->accept = conffile_list;
archive_handle->dpkg__sub_archive->filter = filter_rename_config;
archive_handle->dpkg__sub_archive->action_data = data_extract_all_prefix;
archive_handle->dpkg__sub_archive->dpkg__buffer = (char*)"/"; /* huh? */
archive_handle->dpkg__sub_archive->ah_flags |= ARCHIVE_UNLINK_OLD;
unpack_ar_archive(archive_handle);
/* Create the list file */
list_filename = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, "list");
out_stream = xfopen_for_write(list_filename);
while (archive_handle->dpkg__sub_archive->passed) {
/* the leading . has been stripped by data_extract_all_prefix already */
fputs(archive_handle->dpkg__sub_archive->passed->data, out_stream);
fputc('\n', out_stream);
archive_handle->dpkg__sub_archive->passed = archive_handle->dpkg__sub_archive->passed->link;
}
fclose(out_stream);
/* change status */
set_status(status_num, "install", 1);
set_status(status_num, "unpacked", 3);
free(info_prefix);
free(list_filename);
}
static void configure_package(deb_file_t *deb_file)
{
const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
const char *package_version = name_hashtable[package_hashtable[deb_file->package]->version];
const int status_num = search_status_hashtable(package_name);
printf("Setting up %s (%s)...\n", package_name, package_version);
/* Run the postinst script */
/* TODO: handle failure gracefully */
run_package_script_or_die(package_name, "postinst");
/* Change status to reflect success */
set_status(status_num, "install", 1);
set_status(status_num, "installed", 3);
}
int dpkg_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int dpkg_main(int argc UNUSED_PARAM, char **argv)
{
deb_file_t **deb_file = NULL;
status_node_t *status_node;
char *str_f;
int opt;
int package_num;
int deb_count = 0;
int state_status;
int status_num;
int i;
#if ENABLE_LONG_OPTS
static const char dpkg_longopts[] ALIGN1 =
// FIXME: we use -C non-compatibly, should be:
// "-C|--audit Check for broken package(s)"
"configure\0" No_argument "C"
"force\0" Required_argument "F"
"install\0" No_argument "i"
"list\0" No_argument "l"
"purge\0" No_argument "P"
"remove\0" No_argument "r"
"unpack\0" No_argument "u"
"force-depends\0" No_argument "\xff"
"force-confnew\0" No_argument "\xfe"
"force-confold\0" No_argument "\xfd"
;
#endif
INIT_G();
IF_LONG_OPTS(applet_long_options = dpkg_longopts);
opt = getopt32(argv, "CilPruF:", &str_f);
argv += optind;
//if (opt & OPT_configure) ... // -C
if (opt & OPT_force) { // -F (--force in official dpkg)
if (strcmp(str_f, "depends") == 0)
opt |= OPT_force_ignore_depends;
else if (strcmp(str_f, "confnew") == 0)
opt |= OPT_force_confnew;
else if (strcmp(str_f, "confold") == 0)
opt |= OPT_force_confold;
else
bb_show_usage();
option_mask32 = opt;
}
//if (opt & OPT_install) ... // -i
//if (opt & OPT_list_installed) ... // -l
//if (opt & OPT_purge) ... // -P
//if (opt & OPT_remove) ... // -r
//if (opt & OPT_unpack) ... // -u (--unpack in official dpkg)
if (!(opt & OPTMASK_cmd) /* no cmd */
|| ((opt & OPTMASK_cmd) & ((opt & OPTMASK_cmd)-1)) /* more than one cmd */
) {
bb_show_usage();
}
/* puts("(Reading database ... xxxxx files and directories installed.)"); */
index_status_file("/var/lib/dpkg/status");
/* if the list action was given print the installed packages and exit */
if (opt & OPT_list_installed) {
list_packages(argv[0]); /* param can be NULL */
return EXIT_SUCCESS;
}
/* Read arguments and store relevant info in structs */
while (*argv) {
/* deb_count = nb_elem - 1 and we need nb_elem + 1 to allocate terminal node [NULL pointer] */
deb_file = xrealloc_vector(deb_file, 2, deb_count);
deb_file[deb_count] = xzalloc(sizeof(deb_file[0][0]));
if (opt & (OPT_install | OPT_unpack)) {
/* -i/-u: require filename */
archive_handle_t *archive_handle;
llist_t *control_list = NULL;
/* Extract the control file */
llist_add_to(&control_list, (char*)"./control");
archive_handle = init_archive_deb_ar(argv[0]);
init_archive_deb_control(archive_handle);
deb_file[deb_count]->control_file = deb_extract_control_file_to_buffer(archive_handle, control_list);
if (deb_file[deb_count]->control_file == NULL) {
bb_error_msg_and_die("can't extract control file");
}
deb_file[deb_count]->filename = xstrdup(argv[0]);
package_num = fill_package_struct(deb_file[deb_count]->control_file);
if (package_num == -1) {
bb_error_msg("invalid control file in %s", argv[0]);
argv++;
continue;
}
deb_file[deb_count]->package = (unsigned) package_num;
/* Add the package to the status hashtable */
if (opt & (OPT_unpack | OPT_install)) {
/* Try and find a currently installed version of this package */
status_num = search_status_hashtable(name_hashtable[package_hashtable[deb_file[deb_count]->package]->name]);
/* If no previous entry was found initialise a new entry */
if (status_hashtable[status_num] == NULL
|| status_hashtable[status_num]->status == 0
) {
status_node = xmalloc(sizeof(status_node_t));
status_node->package = deb_file[deb_count]->package;
/* reinstreq isnt changed to "ok" until the package control info
* is written to the status file*/
status_node->status = search_name_hashtable("install reinstreq not-installed");
status_hashtable[status_num] = status_node;
} else {
set_status(status_num, "install", 1);
set_status(status_num, "reinstreq", 2);
}
}
} else if (opt & (OPT_configure | OPT_purge | OPT_remove)) {
/* -C/-p/-r: require package name */
deb_file[deb_count]->package = search_package_hashtable(
search_name_hashtable(argv[0]),
search_name_hashtable("ANY"), VER_ANY);
if (package_hashtable[deb_file[deb_count]->package] == NULL) {
bb_error_msg_and_die("package %s is uninstalled or unknown", argv[0]);
}
package_num = deb_file[deb_count]->package;
status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
state_status = get_status(status_num, 3);
/* check package status is "installed" */
if (opt & OPT_remove) {
if (strcmp(name_hashtable[state_status], "not-installed") == 0
|| strcmp(name_hashtable[state_status], "config-files") == 0
) {
bb_error_msg_and_die("%s is already removed", name_hashtable[package_hashtable[package_num]->name]);
}
set_status(status_num, "deinstall", 1);
} else if (opt & OPT_purge) {
/* if package status is "conf-files" then its ok */
if (strcmp(name_hashtable[state_status], "not-installed") == 0) {
bb_error_msg_and_die("%s is already purged", name_hashtable[package_hashtable[package_num]->name]);
}
set_status(status_num, "purge", 1);
}
}
deb_count++;
argv++;
}
if (!deb_count)
bb_error_msg_and_die("no package files specified");
deb_file[deb_count] = NULL;
/* Check that the deb file arguments are installable */
if (!(opt & OPT_force_ignore_depends)) {
if (!check_deps(deb_file, 0 /*, deb_count*/)) {
bb_error_msg_and_die("dependency check failed");
}
}
/* TODO: install or remove packages in the correct dependency order */
for (i = 0; i < deb_count; i++) {
/* Remove or purge packages */
if (opt & OPT_remove) {
remove_package(deb_file[i]->package, 1);
}
else if (opt & OPT_purge) {
purge_package(deb_file[i]->package);
}
else if (opt & OPT_unpack) {
unpack_package(deb_file[i]);
}
else if (opt & OPT_install) {
unpack_package(deb_file[i]);
/* package is configured in second pass below */
}
else if (opt & OPT_configure) {
configure_package(deb_file[i]);
}
}
/* configure installed packages */
if (opt & OPT_install) {
for (i = 0; i < deb_count; i++)
configure_package(deb_file[i]);
}
write_status_file(deb_file);
if (ENABLE_FEATURE_CLEAN_UP) {
for (i = 0; i < deb_count; i++) {
free(deb_file[i]->control_file);
free(deb_file[i]->filename);
free(deb_file[i]);
}
free(deb_file);
for (i = 0; i < NAME_HASH_PRIME; i++) {
free(name_hashtable[i]);
}
for (i = 0; i < PACKAGE_HASH_PRIME; i++) {
free_package(package_hashtable[i]);
}
for (i = 0; i < STATUS_HASH_PRIME; i++) {
free(status_hashtable[i]);
}
free(status_hashtable);
free(package_hashtable);
free(name_hashtable);
}
return EXIT_SUCCESS;
}